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https://github.com/RfidResearchGroup/proxmark3.git
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Port des on device to mbedtls_des
This commit is contained in:
Bjoern Kerler
parent
c06864dcc7
commit
4501805709
6 changed files with 41 additions and 683 deletions
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@ -31,18 +31,20 @@
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#include <string.h>
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#include "commonutil.h"
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#include "crc32.h"
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#include "mbedtls/aes.h"
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#include "crc.h"
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#include "crc16.h" // crc16 ccitt
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#include "printf.h"
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#include "iso14443a.h"
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#include "dbprint.h"
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#include "des.h"
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#ifndef AddCrc14A
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# define AddCrc14A(data, len) compute_crc(CRC_14443_A, (data), (len), (data)+(len), (data)+(len)+1)
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#endif
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static mbedtls_des_context ctx;
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static mbedtls_des3_context ctx3;
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static mbedtls_aes_context actx;
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static inline void update_key_schedules(desfirekey_t key);
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static inline void update_key_schedules(desfirekey_t key) {
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@ -54,49 +56,20 @@ static inline void update_key_schedules(desfirekey_t key) {
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}
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/******************************************************************************/
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/*void des_enc(void *out, const void *in, const void *key) {
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mbedtls_des_context ctx;
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void des_encrypt(void *out, const void *in, const void *key) {
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mbedtls_des_setkey_enc(&ctx, key);
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mbedtls_des_crypt_ecb(&ctx, in, out);
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mbedtls_des_free(&ctx);
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}
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void des_dec(void *out, const void *in, const void *key) {
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mbedtls_des_context ctx;
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void des_decrypt(void *out, const void *in, const void *key) {
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mbedtls_des_setkey_dec(&ctx, key);
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mbedtls_des_crypt_ecb(&ctx, in, out);
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mbedtls_des_free(&ctx);
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}
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*/
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void des3_3key_enc(void *out, void *in, const void *key) {
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des_enc(out, in, (uint8_t *)key + 0);
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des_dec(out, out, (uint8_t *)key + 8);
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des_enc(out, out, (uint8_t *)key + 16);
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}
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void des3_3key_dec(void *out, void *in, const uint8_t *key) {
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des_dec(out, in, (uint8_t *)key + 16);
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des_enc(out, out, (uint8_t *)key + 8);
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des_dec(out, out, (uint8_t *)key + 0);
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}
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void des3_2key_enc(void *out, void *in, const void *key) {
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des_enc(out, in, (uint8_t *)key + 0);
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des_dec(out, out, (uint8_t *)key + 8);
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des_enc(out, out, (uint8_t *)key + 0);
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}
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void des3_2key_dec(void *out, void *in, const uint8_t *key) {
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des_dec(out, in, (uint8_t *)key + 0);
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des_enc(out, out, (uint8_t *)key + 8);
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des_dec(out, out, (uint8_t *)key + 0);
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}
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void tdes_nxp_receive(const void *in, void *out, size_t length, const void *key, unsigned char iv[8], int keymode) {
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if (length % 8) return;
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if (keymode == 2) mbedtls_des3_set2key_dec(&ctx3, key);
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else mbedtls_des3_set3key_dec(&ctx3, key);
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uint8_t i;
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unsigned char temp[8];
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@ -106,8 +79,7 @@ void tdes_nxp_receive(const void *in, void *out, size_t length, const void *key,
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while (length > 0) {
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memcpy(temp, tin, 8);
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if (keymode == 2) des3_2key_dec(tout, tin, key);
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else if (keymode == 3) des3_3key_dec(tout, tin, key);
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mbedtls_des3_crypt_ecb(&ctx3, tin, tout);
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for (i = 0; i < 8; i++)
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tout[i] = (unsigned char)(tout[i] ^ iv[i]);
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@ -121,8 +93,9 @@ void tdes_nxp_receive(const void *in, void *out, size_t length, const void *key,
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}
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void tdes_nxp_send(const void *in, void *out, size_t length, const void *key, unsigned char iv[8], int keymode) {
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if (length % 8) return;
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if (keymode == 2) mbedtls_des3_set2key_enc(&ctx3, key);
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else mbedtls_des3_set3key_enc(&ctx3, key);
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uint8_t i;
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uint8_t *tin = (uint8_t *) in;
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@ -132,8 +105,7 @@ void tdes_nxp_send(const void *in, void *out, size_t length, const void *key, un
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for (i = 0; i < 8; i++)
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tin[i] = (unsigned char)(tin[i] ^ iv[i]);
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if (keymode == 2) des3_2key_enc(tout, tin, key);
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else if (keymode == 3) des3_3key_enc(tout, tin, key);
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mbedtls_des3_crypt_ecb(&ctx3, tin, tout);
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memcpy(iv, tout, 8);
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@ -756,7 +728,6 @@ void *mifare_cryto_postprocess_data(desfiretag_t tag, void *data, size_t *nbytes
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void mifare_cypher_single_block(desfirekey_t key, uint8_t *data, uint8_t *ivect, MifareCryptoDirection direction, MifareCryptoOperation operation, size_t block_size) {
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uint8_t ovect[MAX_CRYPTO_BLOCK_SIZE];
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if (direction == MCD_SEND) {
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xor(ivect, data, block_size);
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} else {
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@ -770,40 +741,44 @@ void mifare_cypher_single_block(desfirekey_t key, uint8_t *data, uint8_t *ivect,
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switch (operation) {
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case MCO_ENCYPHER:
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//DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT);
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des_enc(edata, data, key->data);
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des_encrypt(edata, data, key->data);
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break;
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case MCO_DECYPHER:
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//DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT);
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des_dec(edata, data, key->data);
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des_decrypt(edata, data, key->data);
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break;
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}
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break;
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case T_3DES:
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switch (operation) {
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case MCO_ENCYPHER:
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mbedtls_des3_set2key_enc(&ctx3, key->data);
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mbedtls_des3_crypt_ecb(&ctx3, data, edata);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT);
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// DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_DECRYPT);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT);
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des3_2key_enc(edata, data, key->data);
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break;
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case MCO_DECYPHER:
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mbedtls_des3_set2key_dec(&ctx3, key->data);
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mbedtls_des3_crypt_ecb(&ctx3, data, edata);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT);
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// DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_ENCRYPT);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT);
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des3_2key_dec(data, edata, key->data);
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break;
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}
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break;
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case T_3K3DES:
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switch (operation) {
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case MCO_ENCYPHER:
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des3_3key_enc(edata, data, key->data);
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mbedtls_des3_set3key_enc(&ctx3, key->data);
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mbedtls_des3_crypt_ecb(&ctx3, data, edata);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_ENCRYPT);
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// DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_DECRYPT);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks3), DES_ENCRYPT);
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break;
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case MCO_DECYPHER:
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des3_3key_enc(data, edata, key->data);
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mbedtls_des3_set3key_dec(&ctx3, key->data);
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mbedtls_des3_crypt_ecb(&ctx3, data, edata);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks3), DES_DECRYPT);
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// DES_ecb_encrypt ((DES_cblock *) edata, (DES_cblock *) data, &(key->ks2), DES_ENCRYPT);
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// DES_ecb_encrypt ((DES_cblock *) data, (DES_cblock *) edata, &(key->ks1), DES_DECRYPT);
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@ -813,19 +788,15 @@ void mifare_cypher_single_block(desfirekey_t key, uint8_t *data, uint8_t *ivect,
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case T_AES:
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switch (operation) {
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case MCO_ENCYPHER: {
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mbedtls_aes_context ctx;
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mbedtls_aes_init(&ctx);
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mbedtls_aes_setkey_enc(&ctx, key->data, 128);
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mbedtls_aes_crypt_cbc(&ctx, MBEDTLS_AES_ENCRYPT, sizeof(edata), ivect, data, edata);
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mbedtls_aes_free(&ctx);
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mbedtls_aes_init(&actx);
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mbedtls_aes_setkey_enc(&actx, key->data, 128);
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mbedtls_aes_crypt_cbc(&actx, MBEDTLS_AES_ENCRYPT, sizeof(edata), ivect, data, edata);
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break;
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}
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case MCO_DECYPHER: {
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mbedtls_aes_context ctx;
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mbedtls_aes_init(&ctx);
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mbedtls_aes_setkey_dec(&ctx, key->data, 128);
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mbedtls_aes_crypt_cbc(&ctx, MBEDTLS_AES_DECRYPT, sizeof(edata), ivect, edata, data);
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mbedtls_aes_free(&ctx);
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mbedtls_aes_init(&actx);
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mbedtls_aes_setkey_dec(&actx, key->data, 128);
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mbedtls_aes_crypt_cbc(&actx, MBEDTLS_AES_DECRYPT, sizeof(edata), ivect, edata, data);
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break;
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}
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}
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